Upbeat and bouncy, the a capella opening to Take a Chance on Me is one of the most celebrated in pop music, and has defeated many a Friday-night karoke wannabe. Ulvaeus and Andersson chant a tongue-twisting “takeachakachancecchance” throughout, as Fältskog and Lyngstad make their gutsy invitation to reluctant suitors: “If you’ve got no place to go, if you’re feeling down/If you’re all alone when the pretty birds have flown/ Honey I’m still free.” It gave Abba their seventh UK number one.